But to do that, your scope height needs to be the exact same on all rifles or you have to remember the zero on the collimator?

Sorry guys, I am just fed up with my boresighters right now. I guess looking back at hunting season, and seeing all the "one shot a year guys" come in and shooting a new 700 they got at bass pro, and wondering why they ain't cutting x's at 100 yards got me aggriavated.